Compare Any Two Labels, Whatever Their Units
Switch between mcg, mg, g, kg, oz, and lb in one step.
This tool was built by Serge (MSc) using established science and government sources. My academic background covers plant biology, environmental biology, and biogeochemistry. My tools are for educational purposes and give practical guidance, not professional advice.
Two labels can describe the same amount in different units, and a serving size converter lines them up so you can compare them fairly.
Type an amount, pick its unit, and see it in every other weight unit.
The thousandfold mistake
A milligram is a thousand micrograms. Mixing them up changes a dose by a factor of 1,000, which makes it the costliest slip when comparing labels.
Before you compare two products, check whether each value says mg or mcg.
Weight is not volume
The ounces here are weight ounces. A fluid ounce measures volume and cannot be turned into grams without knowing how dense the liquid is.
Quick reference
| Unit | Equals |
|---|---|
| 1 gram | 1,000 mg |
| 1 milligram | 1,000 mcg |
| 1 kilogram | 1,000 g |
| 1 ounce | 28.35 g |
| 1 pound | 453.59 g (16 oz) |
What to do next
If your label gives a scoop and not a weight, start with the Scoop to Grams Converter. With both products in the same unit, the Cost Per Dose Calculator compares their price per real dose.
To see how an amount relates to the daily reference, use the Daily Value (%DV) Calculator, and to match it to a research dose, the Study Dose vs Product Dose tool.
Source
Conversion factors follow NIST Handbook 44, Appendix C: General Tables of Units of Measurement.
This tool is for general education only and is not medical or professional advice. Always check product labels and speak with a qualified professional before making decisions about supplements.